Bobbin for spinning-machines.



F. W. STEINACKER,

BOBBIN FOR SPINNING MACHINES.

APPLICATION FILED MAR. 8, I9I5.

Patented Nov. 14, 1916.

INVENTOR. F WEY NALKER. BY z Y WITNESSES w UNITE ATE BOBIBIN FOR SPIN LYING-MACHINES.

Specification of Letters Patent.

Patented Nov. 14:, 1916.

Application filed March 8, 1915. Serial No. 12,723.

To all whom it may concern:

Be it known that I, FRANK W. STEIN- AGKER, a citizen of the United States, residing at Cleveland, in the county of (uyahoga and State of Ohio, have invented certain new and useful Improvements in Bobbins forSpinning-Machines, of which the following is a specification.

This invention relates to an improvement in bobbins for spinning machines, and the improvement comprises a metal bobbin having a rigid body of extremely light weight and a yarn or thread-winding surface provided with relatively minute pits or pockets of multiform irregularly distributed thereover.

The bobbins commonly used in spinning machines consist of wood. stances these are subjected to extreme changes in temperature, and sometimes moisture. which occasions warping or checking of the surface. For that reason, and also other reasons, the life or utility of a Wooden bobbin is limited.

My object is to provide a metal bobbin which will outwear ten or more wooden bobbins and which is constructed in a particular way to be as light in weight or lighter thana wooden bobbin and also have a winding surface which will retain the yarn or thread during unwinding operations without waste or loss and also without impairing the yarn or thread while being unwound, especially during the final stripping operation of the yarn from the immediate surface of the bobbin.

In the accompanying drawing, Figure 1 is a side view of a spindle and my improved bobbin thereon, and Fig. 2 is a sectional view longitudinally thereof. Figs. 3 .and 4: are magnified views, in cross section and plan, of portions of the body and surface of the bobbin.

The bobbin consists of a tubular body 2 having an integral head 3 cast of aluminum, zinc or an alloy, an aluminum alloy being preferred because of its characteristic light weight. But I wish to explain at the outset thata bobbin having a body of the necessary strength and cast as light as possible cannot be cast light enough to be of practical service in a spinning machine. In other words a bobbin cast of any metal and as taken from the mold is too heavy and requires further treatment or modification to beef utility, and mere lightness is not In many inthe only requirement as the cast surface is also too slippery to hold the yarn and must be treated or modified also to hold the yarn or thread until theend of operatlons without working injury to the. thread.

Consequentlvd subject the cast tubular body I 2 to a finishing process whereby all the'sur able minute multiform pits or shallow depressions everywhere therein. One Way of producting the desired result is bysubjecting the bobbin body 2 after it has been cast to the action of an alkali or acid solution for a predetermined length of. time. The

dissolved or material removed is important and my present practice is to produce an extensiveand widespread pitting of all the surface portions of the body and a material reduction in weight of the original casting. The result is that the bobbin, although made of metal, is reduced materially in weight for practical use on aspinning machine, and

the surface of the bobbin, especially the round cylindrical surface over which the thread or yarn is wound, is made porous or perforated with a strippled effect to provide innumerable air pits or pockets adapted to hold the thread Or yarn until the end of thewinding is reached, such retention of the end windings of the thread or yarn being without excessive strain or undue. resistance to affect. or injure the thread or yarn. Waste and loss of thread or yarn and imperfections in the woven goods, is thereby avoided and the bobbin, especially a bobbin made 'of aluminum or non-corrosive metal is not affected bychanges in temperature or moisture, and is strong and durable and works great economy in the average mill or spinning factory where such devices 105 are used in great numbers.

Thebobbin body 2 is relatively thin over its major length, and has narrow internal annular enlargements 5 'and 6. at its upper end and within head 3, see Fig. 2 to prgr-I- vide bearings for the bobbin when slipped 110 over the spindle 7. Head 3 has edge slots 8 to make the usual engagement with the depth of the pits and the amount of metal rotatable spindle. These details of construction and the shape of the bobbin otherwise, may be greatly modified without departing from the spirit and scope of the invention as set forth herein and in the following claims.

What I claim is:

1. A bobbin for spinning machines made of relatively light metal having a multiplicity of minute air pocl ets over extensive surface areas'thereof to effect holding of the yarn thereon during unwinding operations and to further reduce the Weight of the bobbin.

A bobbin for spinning machines com prising a tubular body made of relatively ight metal and pitted over its thread-winding surface.

3. A bobbin for spinning machines, comprising a relatively thin tubular metal body aving innumerable pits within its surface prising a metal tube'having an enlarged.

head at one end and reduced in its surfaces by an indefinitely lairgenumber of minute pockets of various sizes and form.

. 5. A bobbin for spinning machines comprising a round metal tube having an enlarged end and an indefinitely large number of minute surface depressions over its entire inside and outside surface, area.

6. A bobbin for spinning machines comprising a tubular cast metal body having a thread-Winding surface provided with innumerable minute mu'ltiform pits or cavities in contiguous and wide-spread relations thereover. 4

7. A bobbin for spinning machines comprising a tubular body made of aluminum reduced everywhere in its surface areas by innumer'able'pits and depressions.

In testimony whereof I aflix my signature in presence of two witnesses.

FRANK W. STEINACKER. Witnesses:

R. B. MosER, GEO. E. KRICKER. 

